收藏本站
APCF NOMINAL = 16 kH z ×
× = 0 . 5415 kHz
× cos ( θ = 1.956 Hz
)
APCF EXPECTED =
APCFDEN = INT ?
? = 277
? 1 . 956 Hz ?
LINECYC [ 15 : 0 ]
AccumTime =
2 ×
× No. of Phases Selected
Data Sheet
To set APCFNUM (0x45) and APCFDEN (0x46) to the
calculated value to perform a coarse adjustment on the
imp/kW-hr ratio, use Equation 45 to Equation 47.
220 10
500 130
3200 × 10 × 220
1000 × 3600
? 541. 5 Hz ?
? ?
Under the test conditions above, the AWATTHR register value
is 15559d after the LENERGY interrupt. Using Equation 60 and
Equation 61, the value to be written to AWG is ?199d, 0xF39.
1
FREQ [ 11 : 0 ] × 9 . 6 × 10 ? 6
STEP 1
SET LCYCMODE,
LINECYC AND MASK
REGISTERS
STEP 2
SET UP SYSTEM FOR
I TEST , V NOM , PF = 0.5,
INDUCTIVE
STEP 3
RESET STATUS
REGISTER
STEP 4
READ ALL xWATTHR
REGISTERS AFTER
LENERGY
INTERRUPT
STEP 5
CALCULATE PHASE
ERROR IN DEGREES
FOR ALL PHASES
STEP 6
CALCULATE AND
WRITE TO ALL
xPHCAL REGISTERS
ADE7758
AccumTime =
2 ×
0 x 800
1
2085 × 9 . 6 × 10
? 6
× 3
= 6.832128s
Figure 83. Phase Calibration Using Line Accumulation
Step 1: If the values were changed after gain calibration, Step 1,
WATTHR EXPECTED =
4 × 3200 × 10 × 220 × 1 × 6. 832
1000 × 3600
×
277
1
× 1 = 14804
Step 3, and Step 4 from the gain calibration should be repeated
to configure the LCYCMODE and LINECYC registers.
Step 2: Set the test system for I TEST , V NOM , and 0.5 power factor
inductive.
xWG = ? ?
? 1 ? ? × 2 12 = –198.87640 = –199 = 0xF39
14804
? 15559
?
Step 3: Reset the interrupt status register by reading RSTATUS
(0x1A).
Using Equation 66, the Wh/LSB constant is
Step 4: The xWATTHR registers should be read after the
Wh
LSB
=
10 × 220 × 6. 832
3600 × 14804
= 0.000282 0
LENERGY interrupt. Measure the percent error in the energy
register readings (AWATTHR, BWATTHR, and CWATTHR)
compared to the energy register readings at unity power factor
Error =
2
xWATTHR PF = 1
Phase Calibration Using Line Accumulation
The ADE7758 includes a phase calibration register on each
phase to compensate for small phase errors. Large phase errors
should be compensated by adjusting the antialiasing filters. The
ADE7758 phase calibration is a time delay with different weights
in the positive and negative direction (see the Phase
Compensation section). Because a current transformer is a
source of phase error, a fixed nominal value can be decided on to
load into the xPHCAL (0x3F to 0x41) registers at power-up.
(after gain calibration) using Equation 69. The readings at unity
power factor should have been repeated after the gain calibration
and stored for use in the phase calibration routine.
xWATTHR PF = 1
xWATTHR PF = 5 –
(69)
2
Step 5: Calculate the Phase Error in degrees using the equation
Phase Error ( ° ) = – Arcsin ?
?
During calibration, this value can be adjusted for CT-to-CT
error. Figure 83 shows the steps involved in calibrating the
phase using the line accumulation mode.
? Error ?
? 3 ?
(70)
Step 6: Calculate xPHCAL and write to the xPHCAL registers
(0x3F to 0x41).
xPHCAL =
×
Phase Error ×
1
PHCAL _ LSB _ Weight
×
1 1 (71)
Line Period ( s ) 360 °
where PHCAL_LSB_Weight is 1.2 μs if the %Error is negative
or 2.4 μs if the %Error is positive (see the Phase Compensation
section).
Rev. E | Page 51 of 72
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
ADE7761AARSZ-RL IC ENERGY METERING 1PHASE 20SSOP
ADE7761BARSZ-RL IC ENERGY METERING 1PHASE 20SSOP
ADE7768ARZ-RL IC ENERGY METERING 1PHASE 16SOIC
ADE7769ARZ-RL IC ENERGY METERING 1PHASE 16SOIC
ADM8843ACPZ-REEL7 IC LED DRVR WHITE BCKLGT 16LFCSP
ADP1653ACPZ-R7 IC LED DRVR PHOTO FLASH 16-LFCSP
ADP1712-EVALZ BOARD EVALUATION ADP1712
ADP1720-EVALZ BOARD EVAL FOR ADP1720-ADJ
相关代理商/技术参数
ADE7759 制造商:AD 制造商全称:Analog Devices 功能描述:Active Energy Metering IC with di/dt Sensor Interface
ADE7759ARS 功能描述:IC ENERGY METERING 1PHASE 20SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 能量测量 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:*
ADE7759ARSRL 功能描述:IC ENERGY METERING 1PHASE 20SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 能量测量 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:*
ADE7759ARSZ 功能描述:IC ENERGY METERING 1PHASE 20SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 能量测量 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:*
ADE7759ARSZRL 功能描述:IC ENERGY METERING 1PHASE 20SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 能量测量 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:*
ADE7760 制造商:AD 制造商全称:Analog Devices 功能描述:Energy Metering IC with On-Chip Fault Detection
ADE7760ARS 制造商:Analog Devices 功能描述:Energy Measurement 20-Pin SSOP 制造商:Analog Devices 功能描述:ENERGY METER IC W/ ONCHIP FAULT & OSCIL. - Rail/Tube
ADE7760ARSRL 制造商:Analog Devices 功能描述:Energy Measurement 20-Pin SSOP T/R 制造商:Analog Devices 功能描述:ENERGY METER IC W/ONCHIP FAULT & OSCIL. - Tape and Reel